Added classes to manage simple tabular data of known structure using a

popup containing a wxGrid object.

BasePicker : Abstract class adding a popup to wxPickerBase  styled with
a wxTextCtrl.
BaseGridPicker : Abstract class adding a wxGrid in the popup.

JsonGridPickerCtrl : UI control storing the tabular data in a JSON
array.
LBoundJsonGridPicker : connect JsonGridPicker to database.
LGridJsonCellEditor : use LBoundJsonGridPicker in other wxGrid objects.
LGridJsonCellRenderer : render cell JSON data.

XmlGridPickerCtrl : UI control storing the tabular data in as XML
document.
LBoundXmlGridPicker : connect XmlGridPicker to database.
LGridXmlCellEditor : grid editor for LBoundXmlGridPicker.
LGridXmlCellRenderer : grid renderer for LBoundXmlGridPicker.

JsonHelper and XmlHelper : for applications to quickly get intent value
from database data..

The structure of managed tabular data :

Column 1 : Intent - this is what we want to store/edit. This can be
telephone numbers, email addresses, instant messaging addresses...
any single line piece of information that can exist many times for one
entity (person, company...).
Column 2 : Type - A short description of the intent : 'Home, Work,
Mobile, Fax, Other...'. It is displayed in a non editable wxComboBox.
Column 3 : Preferred - One line of data can be selected as the preferred
one. It is not mandatory, but it must be a single choice.
Column 4 : Notes - single line notes.

Adjust sql scripts and L7.dox.
Applied ANSI formatting style to all files.

Other changes :

Work around a nasty misbehavior.
Grid columns edited by a translated combobox expect full string
data as cell values. LResultSet::BEData() will report these mapped strings,
instead of database real data. LBoundComboBox::IsDirty() will always be
true even if the editor is unchanged once created.
Simplest workaround : disconnect m_BoundComboBox if unchanged.

LGridTextEditor::ProvideFormEditor() : set the form editor's value
explicitely.; wxTextCtrl does not interpret data it receives

LBoundControl::SetNull must be void.

LBoundGrid : Unbind:: instructions should limit to the widget's id, like Bind::

LConnection::GetReturnedKeys should return NULL.
LConnection::SetData should return void.

Notes : wxJSON must be configured with the same prefix as wxWidgets,
here /usr/local/{wxWidgets,wxWidgets-Release}.

L7/LBoundCheckBox.cpp

@@ -10,16 +10,15 @@
 #include "LBoundCheckBox.h"
 
 LBoundCheckBox::LBoundCheckBox(wxWindow* parent, wxWindowID id, long style)
-        : wxCheckBox(parent, id, _T("LCheckBox"), wxDefaultPosition, wxDefaultSize, style)
-{
+: wxCheckBox(parent, id, _T("LCheckBox"), wxDefaultPosition, wxDefaultSize, style) {
     m_sqlQuote = wxEmptyString;
     SetNull();
 }
 
-LBoundCheckBox::~LBoundCheckBox()
-{
+LBoundCheckBox::~LBoundCheckBox() {
     if (m_rs) m_rs->UnRegisterControl(this);
 }
+
 const wxAny LBoundCheckBox::GetData() {
     if (Is3State()) {
         if (Get3StateValue() == wxCHK_UNDETERMINED) return L_SQLNULL;
@@ -30,7 +29,8 @@ const wxAny LBoundCheckBox::GetData() {
         if (GetValue() == wxCHK_CHECKED) return 1;
     }
 }
-bool LBoundCheckBox::SetData(const wxAny& newData) {
+
+void LBoundCheckBox::SetData(const wxAny& newData) {
     /* The interpretation of literal non is not documented 
      * as it's for internal use.
      */
@@ -40,7 +40,7 @@ bool LBoundCheckBox::SetData(const wxAny& newData) {
         if (snewData.IsEmpty()
                 || snewData == L_SQLNULL) {
             Set3StateValue(wxCHK_UNDETERMINED);
-            return true;
+            return;
         }
         if (snewData == _T("0")
                 || snewData.Lower() == _T("no")) {
@@ -48,7 +48,7 @@ bool LBoundCheckBox::SetData(const wxAny& newData) {
         } else {
             Set3StateValue(wxCHK_CHECKED);
         }
-        return true;
+        return;
     } else {
         if (snewData == _T("0")
                 || snewData.IsEmpty()
@@ -58,14 +58,14 @@ bool LBoundCheckBox::SetData(const wxAny& newData) {
             SetValue(wxCHK_CHECKED);
         }
     }
-    return false;
 }
-void LBoundCheckBox::SetResultSet(LResultSet* newResultSet)
-{
+
+void LBoundCheckBox::SetResultSet(LResultSet* newResultSet) {
     m_rs = newResultSet;
     if (m_rs == NULL) return;
     m_rs->RegisterControl(this);
 }
+
 bool LBoundCheckBox::IsNull() {
     if (Is3State()) {
         return (Get3StateValue() == wxCHK_UNDETERMINED);
@@ -73,25 +73,28 @@ bool LBoundCheckBox::IsNull() {
         return false;
     }
 }
-bool LBoundCheckBox::SetNull() {
-    return SetData(wxEmptyString);
+
+void LBoundCheckBox::SetNull() {
+    SetData(wxEmptyString);
 }
+
 bool LBoundCheckBox::IsDirty() {
     wxASSERT_MSG(m_rs != NULL, "m_rs est NULL.");
     wxAny ctrlData = GetData(); // 0, 1 or L_SQLNULL
     wxAny BEData = m_rs->GetData(m_columnName);
-    int iBEData; BEData.GetAs(&iBEData);
+    int iBEData;
+    BEData.GetAs(&iBEData);
     if (Is3State()) {
         if (BEData.IsNull()
-            || BEData.As<wxString>().IsEmpty()) {
+                || BEData.As<wxString>().IsEmpty()) {
             BEData = L_SQLNULL;
         } else if (iBEData != 0) {
             BEData = 1;
         }
     } else {
         if (BEData.IsNull()
-            || iBEData == 0
-            || BEData.As<wxString>().IsEmpty()) {
+                || iBEData == 0
+                || BEData.As<wxString>().IsEmpty()) {
             BEData = 0;
         } else {
             BEData = 1;
@@ -99,6 +102,7 @@ bool LBoundCheckBox::IsDirty() {
     }
     return (ctrlData.As<wxString>() != BEData.As<wxString>());
 }
+
 const wxString LBoundCheckBox::GetDisplayedData() {
     if (Is3State()) {
         if (Get3StateValue() == wxCHK_UNDETERMINED) return L_SQLNULL;